mmc: Add MMC support for stm32h7 Socs
This patch adds SD/MMC support for STM32H7 SoCs.
Here is an extraction of SDMMC main features, embedded in
STM32H7 SoCs.
The SD/MMC block include the following:
_ Full compliance with MultiMediaCard System Specification
Version 4.51. Card support for three different databus modes:
1-bit (default), 4-bit and 8-bit.
_ Full compatibility with previous versions of MultiMediaCards
(backward compatibility).
_ Full compliance with SD memory card specifications version 4.1.
(SDR104 SDMMC_CK speed limited to maximum allowed IO speed,
SPI mode and UHS-II mode not supported).
_ Full compliance with SDIO card specification version 4.0.
Card support for two different databus modes: 1-bit (default)
and 4-bit. (SDR104 SDMMC_CK speed limited to maximum allowed IO
speed, SPI mode and UHS-II mode not supported).
_ Data transfer up to 208 Mbyte/s for the 8 bit mode.
(depending maximum allowed IO speed).
_ Data and command output enable signals to control external
bidirectional drivers.
The current version of the SDMMC supports only one SD/SDIO/MMC card
at any one time and a stack of MMC Version 4.51 or previous.
Signed-off-by: Christophe Kerello <christophe.kerello@st.com>
Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/mmc/Kconfig b/drivers/mmc/Kconfig
index fa24c52..24b4ead 100644
--- a/drivers/mmc/Kconfig
+++ b/drivers/mmc/Kconfig
@@ -384,6 +384,14 @@
the SD Memory Card Specification V2.0, the SDIO V2.0 specification
and CE-ATA V1.1.
+config STM32_SDMMC2
+ bool "STMicroelectronics STM32H7 SD/MMC Host Controller support"
+ depends on DM_MMC && BLK && OF_CONTROL && DM_MMC_OPS
+ help
+ This selects support for the SD/MMC controller on STM32H7 SoCs.
+ If you have a board based on such a SoC and with a SD/MMC slot,
+ say Y or M here.
+
endif
config TEGRA124_MMC_DISABLE_EXT_LOOPBACK